Your question is Transaction System Like Amazon. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Design a transaction system, similar to Amazon shopping.
Asked in the Onsite stage. Second round system design question.
Focus on how you would support cart checkout, payment authorization, inventory reservation, fraud checks, and order confirmation under production constraints. Keep the design practical and explain the ML components, online versus batch paths, and failure handling.